Baudrand Sylvest re Physics Research Commite e 1 Status of the Status of the Longitudinal and Longitudinal and Transverse Polarimeters Transverse Polarimeters •Working polarimeters •HERA polarization status 2005 •Efficiency of the polarimeters •TPOL & LPOL •Cavity LPOL •Energy spectrum with locked or unlocked cavity •Bremsstralung spectra •Present Status •New calorimeter
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Baudrand SylvestrePhysics Research Commitee1 Status of the Longitudinal and Transverse Polarimeters Working polarimeters HERA polarization status 2005.
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Baudrand Sylvestre
Physics Research Commitee 1
Status of the Longitudinal and Status of the Longitudinal and Transverse PolarimetersTransverse Polarimeters
•Working polarimeters
•HERA polarization status 2005
•Efficiency of the polarimeters
•TPOL & LPOL
•Cavity LPOL
•Energy spectrum with locked or unlocked cavity
•Bremsstralung spectra
•Present Status
•New calorimeter
Baudrand Sylvestre
Physics Research Commitee 2
WORKING POLARIMETERSWORKING POLARIMETERS
Baudrand Sylvestre
Physics Research Commitee 3
Polarization Delivered in 2005Polarization Delivered in 2005
•Polarisation is rather low (less than 30%) compared to the previous year.
•Polarization do not show a clear tendency.
•Polarization level is not enough for experiments. For ex.HERMES predictions are based on 50%.
Experiments wait that the Polarization level increase
Helicity change
Baudrand Sylvestre
Physics Research Commitee 4
Efficiency of the PolarimetersEfficiency of the Polarimeters
TPOL ~94% LPOL ~91% Both ~98.25%
• LPOL: Machine studies (begin of 2005) + Time for syst. studies and Cavity studies